Interferometry of a single nanoparticle using the Gouy phase of a focused laser beam Export

@article{citeulike:2397036, abstract = {We provide a quantitative explanation of the mechanism of the far-field intensity modulation induced by a nanoparticle in a focused Gaussian laser beam, as was demonstrated in several recent direct detection studies. Most approaches take advantage of interference between the incident light and the scattered light from a nanoparticle to facilitate a linear dependence of the signal on the nanoparticle volume. The phase relation between the incoming field and the scattered field by the nanoparticle is elucidated by the concept of Gouy phase. This phase relation is used to analyze the far-field signal-to-noise ratio as a function of exact nanoparticle position with respect to the beam focus. The calculation suggests that a purely dispersive nanoparticle should be displaced from the Gaussian beam focus to generate a far-field intensity change.}, author = {Hwang, Jaesuk and Moerner, W. E.}, citeulike-article-id = {2397036}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.optcom.2007.08.032}, citeulike-linkout-1 = {http://www.sciencedirect.com/science/article/B6TVF-4PK8K6P-9/2/ccf1fad921e5026ea3eb77faa7d19399}, day = {15}, doi = {10.1016/j.optcom.2007.08.032}, journal = {Optics Communications}, keywords = {absorption, optics}, month = {December}, number = {2}, pages = {487--491}, posted-at = {2008-02-19 02:49:53}, priority = {2}, title = {Interferometry of a single nanoparticle using the Gouy phase of a focused laser beam}, url = {http://dx.doi.org/10.1016/j.optcom.2007.08.032}, volume = {280}, year = {2007} }

TY - JOUR ID - citeulike:2397036 L3 - citeulike-article-id:2397036 N2 - We provide a quantitative explanation of the mechanism of the far-field intensity modulation induced by a nanoparticle in a focused Gaussian laser beam, as was demonstrated in several recent direct detection studies. Most approaches take advantage of interference between the incident light and the scattered light from a nanoparticle to facilitate a linear dependence of the signal on the nanoparticle volume. The phase relation between the incoming field and the scattered field by the nanoparticle is elucidated by the concept of Gouy phase. This phase relation is used to analyze the far-field signal-to-noise ratio as a function of exact nanoparticle position with respect to the beam focus. The calculation suggests that a purely dispersive nanoparticle should be displaced from the Gaussian beam focus to generate a far-field intensity change. IS - 2 JF - Optics Communications EP - 491 TI - Interferometry of a single nanoparticle using the Gouy phase of a focused laser beam VL - 280 SP - 487 KW - absorption KW - optics AU - Hwang, Jaesuk AU - Moerner, WE PY - 2007/12/15/ UR - http://dx.doi.org/10.1016/j.optcom.2007.08.032 ER -